Lathe-tool



(No Model.)

'A. PATERSON.

LATHE TOOL. 7

No. 382,724. PatentedMaj 15, 188-8.

NuP ETERS. Phmo-Lflhagnpher. Washington. ac;

.' Attofney.

- To all whom it may concern.-

' through them, there being a closure at the in connection with the accompanying drawings, in which is a fillet inform corresponding to the corner UNITED STATES PATENT OF ICE.

NATIONAL TUBE WORKS COMPANY, OF BOSTON, MASSACHUSETTS.

LATHE- TOOL.

SPECIFICATION forming part of Letters Patent No. 382.724, dated May 15, 1888.

Application filed February 23, 1888. Serial No. 264,957. (No model.)

Be it known that I, ANDREW PATERSON, of McKeesport, Allegheny county, Pennsylvania, have inventedcertain new and useful Improvements in Lathe-Tools, of which the following is a specification. I

This invention pertains to lathe-tools designed, primarily, for main boring the nuts of wagon'axles. The nuts referred to are the kind known as blind-nuts or cup-nuts that is to say, the hole'does not go all the way front. These nuts having a flange which is to be faced, the hole is to be bored for the thread and the root of the hole is to be counterbored to furnish clearance for the point of the tap, and the end of the hole-that at the fiange isto be chamfere'd to adapt it to properly seat against the-shoulder of the axle. The work will of course be usually done in a turret-lathe; and for that reason, I have shown my improved tool as provided with a shank adapted for use in a turret.

My improved lathe-tool will be readily understood from the following description, taken Figure l is a perspective view of a lathetool illustrating my improvement, and Fig. 2 a plan of the same. y 7

In the drawings, A indicates the shank of to be held in the ordinary turret of a turretlathe; B, a flange thereon having a diameter somewhat in excess of that of the flange of the nut which the tool is to operate on; O, a stem projecting axially in front of the flange and having a general contour suited to the bore of the nut to be operated uponthat is to say, the stem has an enlargement at-its outer end corresponding with the counterbore'of the nut, and where the stem joins the flange there cut to be taken in the nut; D, a notch or flute milled out of the stem and flange, and E the cutting-edge formed upon flange and stem by one shore of this flute.

The outer face of the flange is out upon a spiral, this spiral retreating from the cuttingthe flange of the nut. The tool while thus in be continued as the grinding becomes worn,

so long as there are substances enough left of the tool to perform its work, and the clearance will remain constant throughout the life of the tool.

In using this tool it is fedendwise into the nut to the proper depth." The extreme forward cutting-point of the tool will thus'bore out the nut, and the fillet portion of the tool willproduce, partially, the corner chamferi ng of the nut, and the flange of the-tool will face o the nut is fed radially outwardly until the body 7 of the stem of the tool produces the exact diameter for the bore of the nut; and by so doing the enlargement upon the end of the stem will cut the counterbore, and the fillet of the tool will have completed the'chamfering of the nut, and, in fact, the exact contourv of the cutting-edge of the tool will havebeen produced in the nut.

To make the tool, it is only necessary to first turn it up in a lathe to proper shape without the clearance, then to mill the flute, and then to putproper screw-gearing on the lathe and produce the proper spirality and recut the facial surfaces of the tool by revolving the lathe backward and forward one revolution, or nearly so.

I claimas my invention- An improved lathe-tool provided with a attaching-shank and with a cutting stem and 0 flange fluted to form a cutting-edge, and having the cutting-faces of flange and stem formed spirally, substantially as and for the purpose set forth.

' ANDREW PATERSONJ-J. Witnesses:

FRANK R. FIELD, H. W. GRAY.

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